Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
  • F16L27/00—Adjustable joints, Joints allowing movement
  • F16L27/08—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
  • B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
  • B60T17/18—Safety devices; Monitoring
  • B60T17/22—Devices for monitoring or checking brake systems; Signal devices
  • B60T17/221—Procedure or apparatus for checking or keeping in a correct functioning condition of brake systems
  • B60T17/222—Procedure or apparatus for checking or keeping in a correct functioning condition of brake systems by filling or bleeding of hydraulic systems
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
  • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
  • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
  • F15B21/04—Special measures taken in connection with the properties of the fluid
  • F15B21/044—Removal or measurement of undissolved gas, e.g. de-aeration, venting or bleeding
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
  • F16L27/00—Adjustable joints, Joints allowing movement
  • F16L27/08—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe
  • F16L27/087—Joints with radial fluid passages
  • F16L27/093—Joints with radial fluid passages of the "banjo" type, i.e. pivoting right-angle couplings
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
  • F16L41/00—Branching pipes; Joining pipes to walls
  • F16L41/005—Branching pipes; Joining pipes to walls adjustable and comprising a hollow threaded part in an opening
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
  • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
  • F16L55/07—Arrangement or mounting of devices, e.g. valves, for venting or aerating or draining
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T137/00—Fluid handling
  • Y10T137/0318—Processes
  • Y10T137/0402—Cleaning, repairing, or assembling
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T137/00—Fluid handling
  • Y10T137/6851—With casing, support, protector or static constructional installations
  • Y10T137/6855—Vehicle

Definitions

• the present invention relates to a connection device to a purge system, more particularly to a bleed screw of an aircraft braking circuit.
• a connection device to a purge system, more particularly to a bleed screw of an aircraft braking circuit.
• the braking systems of an aircraft must be tested.
• the purge operation is to evacuate air from the circuit.
• the portions to be purged each comprise at least one purge system 10 to which a transparent flexible hose 12 can be connected, as illustrated in FIG.
• the purge operation consists in connecting the pipe 12, opening the purge system 10, controlling the flow of the brake fluid in the pipe 12 and any air bubbles, and then closing the purge system 10 when the brake fluid flowing inside the pipe 12 no longer has air bubbles.
• the flexible hose 12 makes it possible to collect the brake fluid and to visualize the presence or absence of air bubbles thanks to its transparency.
• the pipe comprises at one of its ends a rigid tip 14 comprising on the one hand a first bearing surface 16 on which the hose 12 can be fitted, and on the other hand, a threaded bore 18 ( or a second threaded scope) for screwing to the purge system, the first bearing 16 and the bore 18 (or the second bearing) being connected by a conduit 20, substantially coaxial and fixed relative to each other.
• the pipe can sneak between the different elements present in the environment of the purge system.
• the pipe can bend and a nip of the flow section may appear in line with this fold. This pinching limits the flow of the brake fluid which tends to increase the purging time and causes an emulsion of the brake fluid which makes it more difficult to visually check for the presence of air bubbles in the brake fluid.
• connection device is tight to limit the risk of air intake between the conduit and the connecting devices.
• the present invention proposes a purge system comprising a duct opening and upstream a control allowing or not the flow of hydraulic fluid to said duct opening, said control having a section operable with a given tool, said purge system comprising a demonable connection device comprising:
• connection means that can be connected to the purge system
• connection device allows to orient the pipe at 90 ° with respect to the outlet of the purge system which limits the risk of pinching the pipe itself in the case of a restricted space.
• annular portion being pivotable relative to the central portion, it is possible to orient the pipe to an accessible area and / or little crowded.
• FIG. 1 is a section of a connection device according to the prior art
• FIG. 2 is a section of a connection device according to the invention
• FIG. 3 is a side view of a connection device according to the invention.
• FIG. 4 is a perspective view of a first so-called central part of the connection device according to a variant of the invention.
• FIG. 5 is a perspective view of a second so-called annular portion of the connection device according to a variant of the invention.
• FIG. 6 is a perspective view of the end of a pipe.
• a hydraulic circuit comprises at least one purge system, hereinafter referred to as a bleed screw 22.
• a bleed screw 22 is provided at the hydraulic reservoir of a braking circuit of an aircraft.
• the invention is not limited to this application and may be suitable for other hydraulic circuits.
• a bleed screw 22 comprises a duct opening 24 and upstream a control allowing or not the flow of hydraulic fluid to the duct opening. It also comprises connection means 26, a threaded bore or a threaded surface, for example, coaxial with the opening duct 24.
• valve and the connecting means are not further described because they are known to those skilled in the art and may have different configurations.
• a purge tool comprising a pipe 28 and a connection device to ensure the connection between the pipe 28 and the bleed screw 22.
• the pipe 28 is flexible and transparent.
• the pipe 28 is not further described because it is known to those skilled in the art and other solutions could be envisaged for channeling the hydraulic fluid escaping from the bleed screw.
• connection device comprises two parts.
• the first so-called central part 30 (visible in FIG. 3) comprises connecting means 32, a cylindrical bearing surface 34, at least one duct 36 extending from the connection means 32 to the level of the surface 34 'of the cylindrical bearing 34 (this surface 34 'corresponding to the outer surface of a portion of the central portion 30).
• the second so-called annular portion 38 (visible in FIG. 4) has a bore 40 adapted to pivot on the cylindrical seat 34, an outlet at the outer surface of the annular portion 38 and at least one duct 42 connecting the outlet and the 40 'of the bore 40 facing the cylindrical bearing surface 34, the central portion 30 and / or the annular portion 38 having a groove 62 ensuring the flow of hydraulic fluid between the conduits 36 and 42 even if the conduits 36 and 40 are not aligned.
• the groove 62 extends over the entire periphery of the central portion 30 and / or the annular portion 38 so as to ensure the flow of the hydraulic fluid regardless of the relative angular position of the annular portion 38 relative to at the central part 30.
• the central portion 30 has a shape of revolution, with at one end connecting means 32 to the bleed screw 22 in the form of a cylindrical portion (with a diameter smaller than that of the span 34 ) threaded cooperating with the connecting means 26 of the bleed screw.
• the duct 36 comprises, on the one hand, a first section 44 coaxial with the cylindrical portion of the connection means 32 and the bearing surface 34, opening at the level of the connection means 32, and secondly, a plurality of radial channels 46 which extend from the coaxial section 44 to the surface 34 'of the span 34.
• the central portion 30 comprises four radial channels 46 arranged in a plane perpendicular to the axis of the coaxial section 44, forming between them angles of 90 °.
• the central portion 30 also comprises operating means to ensure its connection to the bleed screw 22.
• the central portion 30 comprises between the connecting means 32 and the bearing surface 34, a hexagonal section 48 of the same shape as the control section of the opening or closing of the bleed screw 22. It comprises at its second end (opposite the connection means 32) a flange 50 with a knurled periphery.
• the flange 50 knurled allows a hand screw connection means, the section 48 for screwing using the same tool that used to cause the opening or closing of the bleed screw.
• the clamping using a tool using the section 48 allows in a limited volume to effectively tighten the connection means 32 to limit the risk of air intake between said connecting means 32 and the connecting means 26 Otherwise, an air intake could disturb the purge operation.
• the annular portion 38 comprises at each end flat faces perpendicular to the axis of the bore 40, a first face 52 bearing against the flange 50, the second face 54 bearing against a washer 56 and / or a circlip 58 immobilized in a direction parallel to the axis of the bore 40 in a groove 60 formed on the periphery of the central portion 30.
• Other means could be used to immobilize in the longitudinal direction (coaxial with the direction of the axis of the bearing surface 34, of the bore 40) the annular portion 38 with respect to the central portion 30.
• the radial channels 46 open at the surface 34 'of the surface 34 opposite a peripheral groove 62 formed at the bore 40 of the annular portion.
• Sealing means 64 are interposed between the central portion 30 and the annular portion 38, more precisely between the surface 34 'of the cylindrical seat 34 and the surface 40' of the bore 40, on either side of the 62. According to one embodiment, these sealing means 64 are in the form of two O-rings which are housed in grooves provided on either side of the peripheral groove 62.
• the duct 42 of the annular portion 38 is disposed in a plane perpendicular to the longitudinal axis.
• the outlet of the annular portion 38 is connected to the pipe 28.
• the annular portion 38 comprises, at the outlet, a tube 66, perpendicular to the longitudinal axis in the extension of the duct 42, on which the hose 28 can be fitted.
• the pipe 28 comprises a connector 68 with at one end a bearing on which is fitted the pipe 28 and at a second end a threaded portion 70 adapted to be screwed into a thread provided at level of the open portion of the conduit 42.

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• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Transportation (AREA)
• Chemical & Material Sciences (AREA)
• Analytical Chemistry (AREA)
• Physics & Mathematics (AREA)
• Fluid Mechanics (AREA)
• Valves And Accessory Devices For Braking Systems (AREA)
• Joints Allowing Movement (AREA)

Priority Applications (3)

Applications Claiming Priority (2)

Related Child Applications (1)

Publications (1)

Family

ID=43769705

Family Applications (1)

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Cited By (1)

Families Citing this family (3)

Citations (6)

Family Cites Families (16)

• 2010
  • 2010-09-08 FR FR1057118A patent/FR2964442B1/fr not_active Expired - Fee Related
• 2011
  • 2011-09-05 WO PCT/FR2011/052025 patent/WO2012032254A1/fr active Application Filing
  • 2011-09-05 CN CN201180044151.1A patent/CN103097218B/zh not_active Expired - Fee Related
  • 2011-09-05 EP EP11773031.7A patent/EP2613990B1/de not_active Not-in-force
• 2013
  • 2013-03-06 US US13/786,588 patent/US9157563B2/en not_active Expired - Fee Related

Patent Citations (6)

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